// object types are identical structurally
class A {
    constructor(x){
    }
}
class B {
    constructor(x1){
    }
}
class C {
    constructor(x2){
    }
}
var a;
function foo1(x) {
}
function foo1b(x) {
}
function foo1c(x) {
}
function foo2(x) {
}
function foo3(x) {
}
function foo5(x) {
}
function foo5b(x) {
}
function foo6(x) {
}
function foo7(x) {
}
function foo8(x) {
}
function foo9(x) {
}
function foo10(x) {
}
function foo12(x) {
}
function foo12b(x) {
}
function foo13(x) {
}
function foo15(x) {
}
